Your pixel is sending the right product. The catalog is listening to a different pixel.

What your store sends today

THE SIDEKICK SET
Product 10182098878761 · first variant XS / 4Y = 53698994176297

POST facebook.com/tr
  id  = 1370358243924446   (the only pixel that fires on your site)
  ev  = ViewContent
  cd[content_ids]  = ["53698994176297"]   (variant ID)
  cd[content_type] = product

That's what the Shopify Facebook & Instagram app should send: a variant ID that matches how its own catalog keys items. So the IDs are probably fine. No other pixel fires anywhere on the page.

Why Commerce Manager says "not received"

A catalog only counts events from the pixel or dataset connected to it. You mentioned an older Shopify pixel is connected to the catalog. That pixel never fires on your site, so from the catalog's point of view, ViewContent, AddToCart and Purchase never arrive, and the match rate is 0%.

Catalog "Shopify Product Catalog" (222 items)
  event source: old pixel (silent)

Site events → 1370358243924446 (not linked)

Catalog "Shopify Product Catalog" (222 items)
  event source: 1370358243924446

Site events → 1370358243924446 → match

The fix, in order

1. Commerce Manager → your catalog → Events → Connect tracking: add dataset 1370358243924446.
2. Confirm the catalog's item IDs are the Shopify variant IDs (open one item and check that its Content ID reads like 53698994176297). If they're product IDs or a feed-app format like shopify_US_10182098878761_53698994176297, fix the ID mapping in the feed instead.
3. Only then disconnect the old pixel, so you never lose the only link that exists.

Match rate updates over 24–48 hours of traffic. I'd check Commerce Manager → Events for ViewContent, AddToCart and Purchase above 90% before closing out.